Committee publication · Correspondence · 30 October 2025
Letter to Sir Chris Wormald, Cabinet Secretary and Head of the UK Civil Service on the Cabinet Office vetting of Lord Mandelson, dated 17.10.25
From: Public Administration and Constitutional Affairs Committee
Inquiry: The work of the Cabinet Office
Summary
The Public Administration and Constitutional Affairs Committee, chaired by Simon Hoare MP, writes to the Cabinet Secretary seeking clarification on the vetting processes conducted by the Cabinet Office ahead of Lord Mandelson's appointment as UK Ambassador to the United States. The letter requests details on how the due diligence and security vetting were carried out, who made decisions when concerns were raised, why the Foreign Office was excluded from the process, and whether safeguards were reviewed following revelations about Mandelson's relationship with Jeffrey Epstein.
Key findings
- A due diligence process was carried out by the Propriety and Ethics Team (PET) in the Cabinet Office on Lord Mandelson before his appointment, but details of security concerns and the decision-making process remain opaque.
- The Foreign, Commonwealth and Development Office (FCDO) was not asked to contribute to the due diligence process and was not shared findings from it, raising questions about standard departmental consultation procedures.
- UK Security Vetting (UKSV) also conducted national security vetting in the Cabinet Office, but it is unclear why Mandelson's relationship with Jeffrey Epstein was not flagged by either PET or UKSV.
- The committee seeks to understand how decisions are made to proceed with appointments when concerns are raised during vetting, and whether any process changes have been implemented following the Epstein revelation.
Tone
ProceduralTopics
Key actors
Simon Hoare MP, Sir Chris Wormald, Lord Mandelson, Emily Thornbury MP, Foreign Secretary, Propriety and Ethics Team (PET), UK Security Vetting (UKSV), Foreign, Commonwealth and Development Office (FCDO)
Notable line
“… there remain questions about the process that was carried out by the Cabinet Office which need to be clarified.”
Key Quotes
“… there remain questions about the process that was carried out by the Cabinet Office which need to be clarified.”
“Following the revelation of Lord Mandelson's relationship with Jeffery Epstein, has there been a review of why this relationship was not flagged by either PET or UKSV.”
“We appreciate that the details of the individual case cannot be disclosed but seek to understand how the process currently works and if changes may be needed.”
Source · parliament.uk record ↗